trace/coresight/coresight-tpda.rst

1 .. SPDX-License-Identifier: GPL-2.0
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13 TPDA - The trace performance monitoring and diagnostics aggregator or
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22 Root: ``/sys/bus/coresight/devices/tpda<N>``
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27 The tpdm and tpda nodes should be observed at the coresight path
28 "/sys/bus/coresight/devices".
30 /sys/bus/coresight/devices # ls -l | grep tpd
31 tpda0 -> ../../../devices/platform/soc@0/6004000.tpda/tpda0
32 tpdm0 -> ../../../devices/platform/soc@0/6c08000.mm.tpdm/tpdm0
35 Enable coresight sink first. The port of tpda which is connected to
36 the tpdm will be enabled after commands below.
38 echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
39 echo 1 > /sys/bus/coresight/devices/tpdm0/enable_source
40 echo 1 > /sys/bus/coresight/devices/tpdm0/integration_test
41 echo 2 > /sys/bus/coresight/devices/tpdm0/integration_test
43 The test data will be collected in the coresight sink which is enabled.
46 generated from TPDM to sink.
48 There must be a tpda between tpdm and the sink. When there are some
49 other trace event hw components in the same HW block with tpdm, tpdm
50 and these hw components will connect to the coresight funnel. When
51 there is only tpdm trace hw in the HW block, tpdm will connect to